package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.admin.EmployeeService;
import com.sky.vo.EmployeeLoginVO;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void insert(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置账号的状态，默认正常状态 1表示正常 0表示锁定
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码，默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置当前记录的创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人id和修改人id
        employee.setCreateUser(BaseContext.getCurrentId());//目前写个假数据，后期修改
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public Result<PageResult> selectPage(EmployeePageQueryDTO employeePageQueryDTO) {
        // select * from employee limit 0,10
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        List<Employee> page = employeeMapper.selectPage(employeePageQueryDTO.getName());//后续定义

        PageInfo<Employee> pageInfo = new PageInfo<>(page);
        PageResult pb = new PageResult(pageInfo.getTotal(), pageInfo.getList());

        return Result.success(pb);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Result<Employee> selectById(Long id) {
       Employee employee = employeeMapper.selectById(id);
        return Result.success(employee);
    }

    /**
     * 修改员工信息
     * @param employee
     * @return
     */
    @Override
    public Result update(Employee employee) {
        employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.update(employee);
        return Result.success();
    }

    /**
     * 修改员工状态
     * @param status
     * @param id
     * @return
     */
    @Override
    public Result updateStatus(Integer status, Long id) {
        employeeMapper.updateStatus(status,id);
        return Result.success();
    }

    /**
     * 修改密码
     * @param passwordEditDTO
     * @return
     */
    @Override
    public Result updatePassword(PasswordEditDTO passwordEditDTO) {

        Long empId = BaseContext.getCurrentId();
        String newPassword = passwordEditDTO.getNewPassword();
        System.out.println("empId:"+empId);
        Employee employee = employeeMapper.selectById(empId);
        //取出加密后旧密码
        String oldpassword = employee.getPassword();
        String pdoldpassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if(!pdoldpassword.equals(oldpassword)){
            return Result.error("旧密码输入错误");
        }else if(newPassword.equals(oldpassword)){
            return Result.error("新密码不能与旧密码相同");
        }else{
            //加密新密码
            newPassword = DigestUtils.md5DigestAsHex(newPassword.getBytes());
            employeeMapper.updatePassword(newPassword, empId);
            return Result.success();
        }
    }


}
